--- /dev/null
+/**
+ * \file pcm/pcm_iec958.c
+ * \ingroup PCM_Plugins
+ * \brief PCM IEC958 Subframe Conversion Plugin Interface
+ * \author Takashi Iwai <tiwai@suse.de>
+ * \date 2004
+ */
+/*
+ * PCM - IEC958 Subframe Conversion Plugin
+ * Copyright (c) 2004 by Takashi Iwai <tiwai@suse.de>
+ *
+ *
+ * This library is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License as
+ * published by the Free Software Foundation; either version 2.1 of
+ * the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ *
+ */
+
+#include <byteswap.h>
+#include "pcm_local.h"
+#include "pcm_plugin.h"
+
+#ifndef PIC
+/* entry for static linking */
+const char *_snd_module_pcm_iec958 = "";
+#endif
+
+/*
+ */
+
+#ifndef DOC_HIDDEN
+
+typedef struct snd_pcm_iec958 snd_pcm_iec958_t;
+
+typedef void (*iec958_f)(snd_pcm_iec958_t *iec,
+ const snd_pcm_channel_area_t *dst_areas,
+ snd_pcm_uframes_t dst_offset,
+ const snd_pcm_channel_area_t *src_areas,
+ snd_pcm_uframes_t src_offset,
+ unsigned int channels, snd_pcm_uframes_t frames);
+
+struct snd_pcm_iec958 {
+ /* This field need to be the first */
+ snd_pcm_plugin_t plug;
+ unsigned int getput_idx;
+ iec958_f func;
+ snd_pcm_format_t sformat;
+ snd_pcm_format_t format;
+ unsigned int counter;
+ unsigned char status[24];
+ unsigned int byteswap;
+};
+
+#endif /* DOC_HIDDEN */
+
+/*
+ * Determine parity for time slots 4 upto 30
+ * to be sure that bit 4 upt 31 will carry
+ * an even number of ones and zeros.
+ */
+static unsigned int iec958_parity(unsigned int data)
+{
+ unsigned int parity;
+ int bit;
+
+ data >>= 4; /* start from bit 4 */
+ parity = 0;
+ for (bit = 4; bit <= 30; bit++) {
+ if (data & 1)
+ parity++;
+ data >>= 1;
+ }
+ return (parity & 1);
+}
+
+/*
+ * Compose 32bit IEC958 subframe, two sub frames
+ * build one frame with two channels.
+ *
+ * bit 0-3 = preamble
+ * 4-7 = AUX (=0)
+ * 8-27 = data (12-27 for 16bit, 8-27 for 20bit, and 24bit without AUX)
+ * 28 = validity (0 for valid data, else 'in error')
+ * 29 = user data (0)
+ * 30 = channel status (24 bytes for 192 frames)
+ * 31 = parity
+ */
+
+static inline u_int32_t iec958_subframe(snd_pcm_iec958_t *iec, u_int32_t data, int channel)
+{
+ unsigned int byte = iec->counter >> 3;
+ unsigned int mask = 1 << (iec->counter - (byte << 3));
+
+ /* bit 4-27 */
+ data >>= 4;
+ data &= ~0xf;
+
+ /* set IEC status bits (up to 192 bits) */
+ if (iec->status[byte] & mask)
+ data |= 0x40000000;
+
+ if (iec958_parity(data)) /* parity bit 4-30 */
+ data |= 0x80000000;
+
+ /* Preamble */
+ if (! iec->counter)
+ data |= 0x03; /* Block start, 'Z' */
+ else if (! channel)
+ data |= 0x05; /* odd sub frame, 'Y' */
+ else
+ data |= 0x09; /* even sub frame, 'X' */
+
+ if (iec->byteswap)
+ data = bswap_32(data);
+
+ return data;
+}
+
+static inline int32_t iec958_to_s32(snd_pcm_iec958_t *iec, u_int32_t data)
+{
+ if (iec->byteswap)
+ data = bswap_32(data);
+ data &= ~0xf;
+ data <<= 4;
+ return (int32_t)data;
+}
+
+static void snd_pcm_iec958_decode(snd_pcm_iec958_t *iec,
+ const snd_pcm_channel_area_t *dst_areas,
+ snd_pcm_uframes_t dst_offset,
+ const snd_pcm_channel_area_t *src_areas,
+ snd_pcm_uframes_t src_offset,
+ unsigned int channels, snd_pcm_uframes_t frames)
+{
+#define PUT32_LABELS
+#include "plugin_ops.h"
+#undef PUT32_LABELS
+ void *put = put32_labels[iec->getput_idx];
+ unsigned int channel;
+ for (channel = 0; channel < channels; ++channel) {
+ const u_int32_t *src;
+ char *dst;
+ int src_step, dst_step;
+ snd_pcm_uframes_t frames1;
+ const snd_pcm_channel_area_t *src_area = &src_areas[channel];
+ const snd_pcm_channel_area_t *dst_area = &dst_areas[channel];
+ src = snd_pcm_channel_area_addr(src_area, src_offset);
+ dst = snd_pcm_channel_area_addr(dst_area, dst_offset);
+ src_step = snd_pcm_channel_area_step(src_area) / sizeof(u_int32_t);
+ dst_step = snd_pcm_channel_area_step(dst_area);
+ frames1 = frames;
+ while (frames1-- > 0) {
+ int32_t sample = iec958_to_s32(iec, *src);
+ goto *put;
+#define PUT32_END after
+#include "plugin_ops.h"
+#undef PUT32_END
+ after:
+ src += src_step;
+ dst += dst_step;
+ }
+ }
+}
+
+static void snd_pcm_iec958_encode(snd_pcm_iec958_t *iec,
+ const snd_pcm_channel_area_t *dst_areas,
+ snd_pcm_uframes_t dst_offset,
+ const snd_pcm_channel_area_t *src_areas,
+ snd_pcm_uframes_t src_offset,
+ unsigned int channels, snd_pcm_uframes_t frames)
+{
+#define GET32_LABELS
+#include "plugin_ops.h"
+#undef GET32_LABELS
+ void *get = get32_labels[iec->getput_idx];
+ unsigned int channel;
+ int32_t sample = 0;
+ int counter = iec->counter;
+ for (channel = 0; channel < channels; ++channel) {
+ const char *src;
+ u_int32_t *dst;
+ int src_step, dst_step;
+ snd_pcm_uframes_t frames1;
+ const snd_pcm_channel_area_t *src_area = &src_areas[channel];
+ const snd_pcm_channel_area_t *dst_area = &dst_areas[channel];
+ src = snd_pcm_channel_area_addr(src_area, src_offset);
+ dst = snd_pcm_channel_area_addr(dst_area, dst_offset);
+ src_step = snd_pcm_channel_area_step(src_area);
+ dst_step = snd_pcm_channel_area_step(dst_area) / sizeof(u_int32_t);
+ frames1 = frames;
+ iec->counter = counter;
+ while (frames1-- > 0) {
+ goto *get;
+#define GET32_END after
+#include "plugin_ops.h"
+#undef GET32_END
+ after:
+ sample = iec958_subframe(iec, sample, channel);
+ // fprintf(stderr, "%d:%08x\n", frames1, sample);
+ *dst = sample;
+ src += src_step;
+ dst += dst_step;
+ iec->counter++;
+ iec->counter %= 192;
+ }
+ }
+}
+
+static int snd_pcm_iec958_hw_refine_cprepare(snd_pcm_t *pcm, snd_pcm_hw_params_t *params)
+{
+ snd_pcm_iec958_t *iec = pcm->private_data;
+ int err;
+ snd_pcm_access_mask_t access_mask = { SND_PCM_ACCBIT_SHM };
+ err = _snd_pcm_hw_param_set_mask(params, SND_PCM_HW_PARAM_ACCESS,
+ &access_mask);
+ if (err < 0)
+ return err;
+ if (iec->sformat == SND_PCM_FORMAT_IEC958_SUBFRAME_LE ||
+ iec->sformat == SND_PCM_FORMAT_IEC958_SUBFRAME_BE) {
+ snd_pcm_format_mask_t format_mask = { SND_PCM_FMTBIT_LINEAR };
+ err = _snd_pcm_hw_param_set_mask(params, SND_PCM_HW_PARAM_FORMAT,
+ &format_mask);
+ } else {
+ snd_pcm_format_mask_t format_mask = {
+ { (1U << SND_PCM_FORMAT_IEC958_SUBFRAME_LE) |
+ (1U << SND_PCM_FORMAT_IEC958_SUBFRAME_BE) }
+ };
+ err = _snd_pcm_hw_param_set_mask(params, SND_PCM_HW_PARAM_FORMAT,
+ &format_mask);
+ }
+ if (err < 0)
+ return err;
+ err = _snd_pcm_hw_params_set_subformat(params, SND_PCM_SUBFORMAT_STD);
+ if (err < 0)
+ return err;
+ params->info &= ~(SND_PCM_INFO_MMAP | SND_PCM_INFO_MMAP_VALID);
+ return 0;
+}
+
+static int snd_pcm_iec958_hw_refine_sprepare(snd_pcm_t *pcm, snd_pcm_hw_params_t *sparams)
+{
+ snd_pcm_iec958_t *iec = pcm->private_data;
+ snd_pcm_access_mask_t saccess_mask = { SND_PCM_ACCBIT_MMAP };
+ _snd_pcm_hw_params_any(sparams);
+ _snd_pcm_hw_param_set_mask(sparams, SND_PCM_HW_PARAM_ACCESS,
+ &saccess_mask);
+ _snd_pcm_hw_params_set_format(sparams, iec->sformat);
+ _snd_pcm_hw_params_set_subformat(sparams, SND_PCM_SUBFORMAT_STD);
+ return 0;
+}
+
+static int snd_pcm_iec958_hw_refine_schange(snd_pcm_t *pcm ATTRIBUTE_UNUSED, snd_pcm_hw_params_t *params,
+ snd_pcm_hw_params_t *sparams)
+{
+ int err;
+ unsigned int links = (SND_PCM_HW_PARBIT_CHANNELS |
+ SND_PCM_HW_PARBIT_RATE |
+ SND_PCM_HW_PARBIT_PERIOD_SIZE |
+ SND_PCM_HW_PARBIT_BUFFER_SIZE |
+ SND_PCM_HW_PARBIT_PERIODS |
+ SND_PCM_HW_PARBIT_PERIOD_TIME |
+ SND_PCM_HW_PARBIT_BUFFER_TIME |
+ SND_PCM_HW_PARBIT_TICK_TIME);
+ err = _snd_pcm_hw_params_refine(sparams, links, params);
+ if (err < 0)
+ return err;
+ return 0;
+}
+
+static int snd_pcm_iec958_hw_refine_cchange(snd_pcm_t *pcm ATTRIBUTE_UNUSED, snd_pcm_hw_params_t *params,
+ snd_pcm_hw_params_t *sparams)
+{
+ int err;
+ unsigned int links = (SND_PCM_HW_PARBIT_CHANNELS |
+ SND_PCM_HW_PARBIT_RATE |
+ SND_PCM_HW_PARBIT_PERIOD_SIZE |
+ SND_PCM_HW_PARBIT_BUFFER_SIZE |
+ SND_PCM_HW_PARBIT_PERIODS |
+ SND_PCM_HW_PARBIT_PERIOD_TIME |
+ SND_PCM_HW_PARBIT_BUFFER_TIME |
+ SND_PCM_HW_PARBIT_TICK_TIME);
+ err = _snd_pcm_hw_params_refine(params, links, sparams);
+ if (err < 0)
+ return err;
+ return 0;
+}
+
+static int snd_pcm_iec958_hw_refine(snd_pcm_t *pcm, snd_pcm_hw_params_t *params)
+{
+ return snd_pcm_hw_refine_slave(pcm, params,
+ snd_pcm_iec958_hw_refine_cprepare,
+ snd_pcm_iec958_hw_refine_cchange,
+ snd_pcm_iec958_hw_refine_sprepare,
+ snd_pcm_iec958_hw_refine_schange,
+ snd_pcm_plugin_hw_refine_slave);
+}
+
+static int snd_pcm_iec958_hw_params(snd_pcm_t *pcm, snd_pcm_hw_params_t * params)
+{
+ snd_pcm_iec958_t *iec = pcm->private_data;
+ snd_pcm_format_t format;
+ int err = snd_pcm_hw_params_slave(pcm, params,
+ snd_pcm_iec958_hw_refine_cchange,
+ snd_pcm_iec958_hw_refine_sprepare,
+ snd_pcm_iec958_hw_refine_schange,
+ snd_pcm_plugin_hw_params_slave);
+ if (err < 0)
+ return err;
+
+ err = INTERNAL(snd_pcm_hw_params_get_format)(params, &format);
+ if (err < 0)
+ return err;
+
+ iec->format = format;
+ if (pcm->stream == SND_PCM_STREAM_PLAYBACK) {
+ if (iec->sformat == SND_PCM_FORMAT_IEC958_SUBFRAME_LE ||
+ iec->sformat == SND_PCM_FORMAT_IEC958_SUBFRAME_BE) {
+ iec->getput_idx = snd_pcm_linear_get_index(format, SND_PCM_FORMAT_S32);
+ iec->func = snd_pcm_iec958_encode;
+ iec->byteswap = iec->sformat != SND_PCM_FORMAT_IEC958_SUBFRAME;
+ } else {
+ iec->getput_idx = snd_pcm_linear_put_index(SND_PCM_FORMAT_S32, iec->sformat);
+ iec->func = snd_pcm_iec958_decode;
+ iec->byteswap = format != SND_PCM_FORMAT_IEC958_SUBFRAME;
+ }
+ } else {
+ if (iec->sformat == SND_PCM_FORMAT_IEC958_SUBFRAME_LE ||
+ iec->sformat == SND_PCM_FORMAT_IEC958_SUBFRAME_BE) {
+ iec->getput_idx = snd_pcm_linear_put_index(SND_PCM_FORMAT_S32, format);
+ iec->func = snd_pcm_iec958_decode;
+ iec->byteswap = iec->sformat != SND_PCM_FORMAT_IEC958_SUBFRAME;
+ } else {
+ iec->getput_idx = snd_pcm_linear_get_index(iec->sformat, SND_PCM_FORMAT_S32);
+ iec->func = snd_pcm_iec958_encode;
+ iec->byteswap = format != SND_PCM_FORMAT_IEC958_SUBFRAME;
+ }
+ }
+ /* FIXME: needs to adjust status_bits according to the format
+ * and sample rate
+ */
+ return 0;
+}
+
+static snd_pcm_uframes_t
+snd_pcm_iec958_write_areas(snd_pcm_t *pcm,
+ const snd_pcm_channel_area_t *areas,
+ snd_pcm_uframes_t offset,
+ snd_pcm_uframes_t size,
+ const snd_pcm_channel_area_t *slave_areas,
+ snd_pcm_uframes_t slave_offset,
+ snd_pcm_uframes_t *slave_sizep)
+{
+ snd_pcm_iec958_t *iec = pcm->private_data;
+ if (size > *slave_sizep)
+ size = *slave_sizep;
+ iec->func(iec, slave_areas, slave_offset,
+ areas, offset,
+ pcm->channels, size);
+ *slave_sizep = size;
+ return size;
+}
+
+static snd_pcm_uframes_t
+snd_pcm_iec958_read_areas(snd_pcm_t *pcm,
+ const snd_pcm_channel_area_t *areas,
+ snd_pcm_uframes_t offset,
+ snd_pcm_uframes_t size,
+ const snd_pcm_channel_area_t *slave_areas,
+ snd_pcm_uframes_t slave_offset,
+ snd_pcm_uframes_t *slave_sizep)
+{
+ snd_pcm_iec958_t *iec = pcm->private_data;
+ if (size > *slave_sizep)
+ size = *slave_sizep;
+ iec->func(iec, areas, offset,
+ slave_areas, slave_offset,
+ pcm->channels, size);
+ *slave_sizep = size;
+ return size;
+}
+
+static int snd_pcm_iec958_init(snd_pcm_t *pcm)
+{
+ snd_pcm_iec958_t *iec = pcm->private_data;
+ iec->counter = 0;
+ return 0;
+}
+
+static void snd_pcm_iec958_dump(snd_pcm_t *pcm, snd_output_t *out)
+{
+ snd_pcm_iec958_t *iec = pcm->private_data;
+ snd_output_printf(out, "IEC958 subframe conversion PCM (%s)\n",
+ snd_pcm_format_name(iec->sformat));
+ if (pcm->setup) {
+ snd_output_printf(out, "Its setup is:\n");
+ snd_pcm_dump_setup(pcm, out);
+ }
+ snd_output_printf(out, "Slave: ");
+ snd_pcm_dump(iec->plug.slave, out);
+}
+
+static snd_pcm_ops_t snd_pcm_iec958_ops = {
+ .close = snd_pcm_plugin_close,
+ .info = snd_pcm_plugin_info,
+ .hw_refine = snd_pcm_iec958_hw_refine,
+ .hw_params = snd_pcm_iec958_hw_params,
+ .hw_free = snd_pcm_plugin_hw_free,
+ .sw_params = snd_pcm_plugin_sw_params,
+ .channel_info = snd_pcm_plugin_channel_info,
+ .dump = snd_pcm_iec958_dump,
+ .nonblock = snd_pcm_plugin_nonblock,
+ .async = snd_pcm_plugin_async,
+ .poll_revents = snd_pcm_plugin_poll_revents,
+ .mmap = snd_pcm_plugin_mmap,
+ .munmap = snd_pcm_plugin_munmap,
+};
+
+/**
+ * \brief Creates a new IEC958 subframe conversion PCM
+ * \param pcmp Returns created PCM handle
+ * \param name Name of PCM
+ * \param sformat Slave (destination) format
+ * \param slave Slave PCM handle
+ * \param close_slave When set, the slave PCM handle is closed with copy PCM
+ * \retval zero on success otherwise a negative error code
+ * \warning Using of this function might be dangerous in the sense
+ * of compatibility reasons. The prototype might be freely
+ * changed in future.
+ */
+int snd_pcm_iec958_open(snd_pcm_t **pcmp, const char *name, snd_pcm_format_t sformat, snd_pcm_t *slave, int close_slave, const unsigned char *status_bits)
+{
+ snd_pcm_t *pcm;
+ snd_pcm_iec958_t *iec;
+ int err;
+ static unsigned char default_status_bits[] = {
+ IEC958_AES0_CON_EMPHASIS_NONE,
+ IEC958_AES1_CON_ORIGINAL | IEC958_AES1_CON_PCM_CODER,
+ 0,
+ IEC958_AES3_CON_FS_48000
+ };
+
+ assert(pcmp && slave);
+ if (snd_pcm_format_linear(sformat) != 1 &&
+ sformat != SND_PCM_FORMAT_IEC958_SUBFRAME_LE &&
+ sformat != SND_PCM_FORMAT_IEC958_SUBFRAME_BE)
+ return -EINVAL;
+ iec = calloc(1, sizeof(snd_pcm_iec958_t));
+ if (!iec) {
+ return -ENOMEM;
+ }
+ snd_pcm_plugin_init(&iec->plug);
+ iec->sformat = sformat;
+ iec->plug.read = snd_pcm_iec958_read_areas;
+ iec->plug.write = snd_pcm_iec958_write_areas;
+ iec->plug.init = snd_pcm_iec958_init;
+ iec->plug.undo_read = snd_pcm_plugin_undo_read_generic;
+ iec->plug.undo_write = snd_pcm_plugin_undo_write_generic;
+ iec->plug.slave = slave;
+ iec->plug.close_slave = close_slave;
+
+ if (status_bits)
+ memcpy(iec->status, status_bits, sizeof(iec->status));
+ else
+ memcpy(iec->status, default_status_bits, sizeof(default_status_bits));
+
+ err = snd_pcm_new(&pcm, SND_PCM_TYPE_IEC958, name, slave->stream, slave->mode);
+ if (err < 0) {
+ free(iec);
+ return err;
+ }
+ pcm->ops = &snd_pcm_iec958_ops;
+ pcm->fast_ops = &snd_pcm_plugin_fast_ops;
+ pcm->private_data = iec;
+ pcm->poll_fd = slave->poll_fd;
+ pcm->poll_events = slave->poll_events;
+ snd_pcm_set_hw_ptr(pcm, &iec->plug.hw_ptr, -1, 0);
+ snd_pcm_set_appl_ptr(pcm, &iec->plug.appl_ptr, -1, 0);
+ *pcmp = pcm;
+
+ return 0;
+}
+
+/*! \page pcm_plugins
+
+\section pcm_plugins_iec958 Plugin: IEC958
+
+This plugin converts 32bit IEC958 subframe samples to linear, or linear to
+32bit IEC958 subframe samples.
+
+\code
+pcm.name {
+ type iec958 # IEC958 subframe conversion PCM
+ slave STR # Slave name
+ # or
+ slave { # Slave definition
+ pcm STR # Slave PCM name
+ # or
+ pcm { } # Slave PCM definition
+ }
+ [status status-bytes] # IEC958 status bits (given in byte array)
+}
+\endcode
+
+\subsection pcm_plugins_iec958_funcref Function reference
+
+<UL>
+ <LI>snd_pcm_iec958_open()
+ <LI>_snd_pcm_iec958_open()
+</UL>
+
+*/
+
+/**
+ * \brief Creates a new IEC958 subframe conversion PCM
+ * \param pcmp Returns created PCM handle
+ * \param name Name of PCM
+ * \param root Root configuration node
+ * \param conf Configuration node with copy PCM description
+ * \param stream Stream type
+ * \param mode Stream mode
+ * \retval zero on success otherwise a negative error code
+ * \warning Using of this function might be dangerous in the sense
+ * of compatibility reasons. The prototype might be freely
+ * changed in future.
+ */
+int _snd_pcm_iec958_open(snd_pcm_t **pcmp, const char *name,
+ snd_config_t *root, snd_config_t *conf,
+ snd_pcm_stream_t stream, int mode)
+{
+ snd_config_iterator_t i, next;
+ int err;
+ snd_pcm_t *spcm;
+ snd_config_t *slave = NULL, *sconf;
+ snd_config_t *status = NULL;
+ snd_pcm_format_t sformat;
+ unsigned char status_bits[24];
+
+ snd_config_for_each(i, next, conf) {
+ snd_config_t *n = snd_config_iterator_entry(i);
+ const char *id;
+ if (snd_config_get_id(n, &id) < 0)
+ continue;
+ if (snd_pcm_conf_generic_id(id))
+ continue;
+ if (strcmp(id, "slave") == 0) {
+ slave = n;
+ continue;
+ }
+ if (strcmp(id, "status") == 0) {
+ if (snd_config_get_type(n) != SND_CONFIG_TYPE_COMPOUND) {
+ SNDERR("Invalid type for %s", id);
+ return -EINVAL;
+ }
+ status = n;
+ continue;
+ }
+ SNDERR("Unknown field %s", id);
+ return -EINVAL;
+ }
+ memset(status_bits, 0, sizeof(status_bits));
+ if (status) {
+ snd_config_iterator_t i, inext;
+ int bytes = 0;
+ snd_config_for_each(i, inext, status) {
+ long val;
+ snd_config_t *n = snd_config_iterator_entry(i);
+ if (snd_config_get_type(n) != SND_CONFIG_TYPE_INTEGER) {
+ SNDERR("invalid IEC958 status bits");
+ return -EINVAL;
+ }
+ err = snd_config_get_integer(n, &val);
+ if (err < 0) {
+ SNDERR("invalid IEC958 status bits");
+ return err;
+ }
+ status_bits[bytes] = val;
+ bytes++;
+ if (bytes >= (int)sizeof(status_bits))
+ break;
+ }
+ // fprintf(stderr, "STATUS bits: %02x %02x %02x %02x\n", status_bits[0], status_bits[1], status_bits[2], status_bits[3]);
+ }
+ if (!slave) {
+ SNDERR("slave is not defined");
+ return -EINVAL;
+ }
+ err = snd_pcm_slave_conf(root, slave, &sconf, 1,
+ SND_PCM_HW_PARAM_FORMAT, SCONF_MANDATORY, &sformat);
+ if (err < 0)
+ return err;
+ if (snd_pcm_format_linear(sformat) != 1 &&
+ sformat != SND_PCM_FORMAT_IEC958_SUBFRAME_LE &&
+ sformat != SND_PCM_FORMAT_IEC958_SUBFRAME_BE) {
+ snd_config_delete(sconf);
+ SNDERR("invalid slave format");
+ return -EINVAL;
+ }
+ err = snd_pcm_open_slave(&spcm, root, sconf, stream, mode);
+ snd_config_delete(sconf);
+ if (err < 0)
+ return err;
+ err = snd_pcm_iec958_open(pcmp, name, sformat, spcm, 1, status ? status_bits : NULL);
+ if (err < 0)
+ snd_pcm_close(spcm);
+ return err;
+}
+#ifndef DOC_HIDDEN
+SND_DLSYM_BUILD_VERSION(_snd_pcm_iec958_open, SND_PCM_DLSYM_VERSION);
+#endif
git://git.alsa-project.org / alsa-lib.git / commitdiff